Here are some informative stats regarding about TLDs taken from ipwalk.com :
1. .com (53.3 million)
2. .de (9.83 million)
3. .net (7.42 million)
4. .uk (4.97 million)
5. .org (4.84 million)
6. .info (2.83 million)
7. .nl (1.93 million)
8. .eu (1.86 million)
9. .biz (1.39 million)
10 .it (1.21 million)
Its surprisingly weird that .net, which you think is second most popular to .coms are actually ranked third.